Balance between both is healthy because there is always a wide range of how people feel about being 'tested' the more the test can feel like an opportunity rather than a demand the more effectively students will participate, especially if they enjoy the learning.

Summative

Often stressful

Should be applicable to students needs & challenge them accordingly

can be achieved through a multi-modality format

scores

reliability in assessment is meeting an agreed standard as a team (community) this should involve the learners as much as possible